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Old May 15th 06, 03:58 AM posted to rec.radio.amateur.antenna
Cecil Moore
 
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Default FIGHT! FIGHT! FIGHT!

Roy Lewallen wrote:
I don't recall ever having disagreed with anything I've read in Kraus.


Your posting below disagrees with the information on page 464
of "Antennas for all Applications", 3rd edition.

Of course I reject the notion that there's "phase information in the
standing wave current magnitude".


The standing wave current magnitude is sinusoidal, according
to Kraus. How can you possibly have a sinusoidal wave without
an associated phase angle?

For a 1/2WL thin-wire dipole:
If the source current is 1.0 at 0 deg at t=0, the magnitude
of the standing wave current is cos(X) where X is the number
of degrees from the source. Your statement that there is no
phase information in a cosine function is absolutely false.

In fact, in the above example the arc-cosine of the standing
wave magnitude is the phase angle of the reflected current.
The negative of that angle is the phase angle of the forward
current.
--
73, Cecil http://www.qsl.net/w5dxp